This article draws from Morningstar Direct data on March 2019 open-end mutual fund and ETF flows (excluding money-market funds and funds of funds). This article focuses specifically on the 79 firms with between $10 billion and $100 billion (in mutual fund and ETF AUM). 37 of those firms gained net inflows in March, while 42 suffered net outflows.

Baird led the mid-size fund firm pack last month, with estimated net inflows of $3.039 billion, up from $1.323 billion in February. Other big March inflows winners included: First Trust, $1.452 billion (up from $1.058 billion); DoubleLine, $1.368 billion (down from $1.688 billion); Morgan Stanley, $959 million (down from $1.071 billion); and DWS, $950 million (up from $129 million in net outflows).

On the flip side, March was a rough month for SEI, which suffered an estimated $1.656 billion in net outflows, more than any other mid-size firm and up from $75 million in February. Other big March outflows sufferers included: AMG, $1.037 billion (up from $424 million); Harris' Oakmark, $674 million (up from $317 million); Waddell & Reed's Ivy, $629 million (up from $481 million); and Harbor, $586 million (down from $661 million).

As a group, the 79 mid-size fund firms suffered an estimated $201 million in combined net outflows, equivalent to about 0.01 percent of their combined AUM. That's down from $2.064 billion in net mid-size inflows in February.